Main goals

• "This was last time I wrote function that do X in env Y"
• Single machine is not enough. Multithreading must have but it's only beginning.
• 2+? level design.
  • Top level pipe scheme
  • May be some intermediate level
  • Low level implementation of blocks
• "Write once debug everywhere" is not bad. At last you "write once".
• 1-space change semantics should be avoided
  • a +b vs a + b vs a+b
  • a?b:c vs a? b:c vs a ? b:c